Crystallographic and magnetic properties of a Tb3(Fe,Cr)29 single crystal

Abstract A Tb 3 (Fe,Cr) 29 single crystal with the monoclinic Nd 3 (Fe,Ti) 29 -type structure was obtained after proper heat treatment on the original single crystal with a hexagonal structure grown by the Czochralski method. The magnetization curves along the hard and easy directions are presented. The lattice parameters are a =1.058 nm, b =0.848 nm, c =0.968 nm, α = γ =90°, and β =96.93°, respectively. The Curie temperature is 477 K and the saturation magnetizations are 51.74 A m 2 /kg (18.07μ B /f.u.) at 1.5 K and 58.34 A m 2 /kg (20.38μ B /f.u.) at 293 K, respectively. Below room temperature, a first-order magnetization process of type II occurring at the critical field of 6.0 T at 100 K and 5.5 T at 200 K was observed. A magnetohistory effect taking place at about 175 K was also detected on the Tb 3 (Fe,Cr) 29 single crystal.